au reservoir

Humorous alteration of au revoir after reservoir.

au reservoir

1. (humorous) Au revoir.
   • 1855, A Month at Malvern under the Water-cure. With the sequel, etc. Third edition. Reconsidered, rewritten‎:

     “Adieu-au reservoir” (as an ambitious artist once remarked)

   • 1914, Francis Lynde, The City of Numbered Days, Scribner's, page 330:

     "Let her go, Gallagher. I've got everything on skids, even the presses. Au revoir—or perhaps one should say, Au reservoir."

   • 1917, McClure's Magazine ...‎, volume 50, S. S. McClure, Limited:

     They could be heard shouting jocosely to one another across the street: "Bon sewer, monsewer!" "Au reservoir!" Jack thought.